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dnl ARM mpn_addmul_1 and mpn_submul_1.
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dnl Copyright 1998, 2000, 2001, 2003, 2012 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C StrongARM: ?
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C XScale ?
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C Cortex-A7 ?
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C Cortex-A8 ?
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C Cortex-A9 5.25
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C Cortex-A15 4
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define(`rp', `r0')
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define(`up', `r1')
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define(`n', `r2')
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define(`vl', `r3')
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define(`rl', `r12')
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define(`ul', `r6')
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define(`r', `lr')
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ifdef(`OPERATION_addmul_1', `
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define(`ADDSUB', adds)
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define(`ADDSUBC', adcs)
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define(`CLRRCY', `mov $1, #0
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adds r0, r0, #0')
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define(`RETVAL', `adc r0, r4, #0')
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define(`func', mpn_addmul_1)')
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ifdef(`OPERATION_submul_1', `
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define(`ADDSUB', subs)
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define(`ADDSUBC', sbcs)
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define(`CLRRCY', `subs $1, r0, r0')
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define(`RETVAL', `sbc r0, r0, r0
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sub r0, $1, r0')
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define(`func', mpn_submul_1)')
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MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)
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ASM_START()
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PROLOGUE(func)
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stmfd sp!, { r4-r6, lr }
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CLRRCY( r4)
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tst n, #1
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beq L(skip1)
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ldr ul, [up], #4
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ldr rl, [rp, #0]
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umull r5, r4, ul, vl
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ADDSUB r, rl, r5
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str r, [rp], #4
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L(skip1):
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tst n, #2
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beq L(skip2)
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ldr ul, [up], #4
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ldr rl, [rp, #0]
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mov r5, #0
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umlal r4, r5, ul, vl
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ldr ul, [up], #4
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ADDSUBC r, rl, r4
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ldr rl, [rp, #4]
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mov r4, #0
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umlal r5, r4, ul, vl
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str r, [rp], #4
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ADDSUBC r, rl, r5
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str r, [rp], #4
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L(skip2):
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bics n, n, #3
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beq L(rtn)
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ldr ul, [up], #4
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ldr rl, [rp, #0]
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mov r5, #0
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umlal r4, r5, ul, vl
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b L(in)
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L(top): ldr ul, [up], #4
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ADDSUBC r, rl, r5
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ldr rl, [rp, #4]
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mov r5, #0
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umlal r4, r5, ul, vl
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str r, [rp], #4
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L(in): ldr ul, [up], #4
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ADDSUBC r, rl, r4
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ldr rl, [rp, #4]
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mov r4, #0
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umlal r5, r4, ul, vl
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str r, [rp], #4
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ldr ul, [up], #4
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ADDSUBC r, rl, r5
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ldr rl, [rp, #4]
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mov r5, #0
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umlal r4, r5, ul, vl
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str r, [rp], #4
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ldr ul, [up], #4
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ADDSUBC r, rl, r4
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ldr rl, [rp, #4]
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mov r4, #0
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umlal r5, r4, ul, vl
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sub n, n, #4
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tst n, n
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str r, [rp], #4
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bne L(top)
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ADDSUBC r, rl, r5
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str r, [rp]
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L(rtn): RETVAL( r4)
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ldmfd sp!, { r4-r6, pc }
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EPILOGUE()
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